Tirukkural 421: Fortress of Wisdom

Wisdom is a weapon to ward off destruction; it is an inner fortress which enemies cannot destroy.

Image of Satguru Sivaya Subramuniyaswami
Siva is the Self of your self. He is closer than your own breath. His nature is love, and if you worship Him with devotion you will know love and be loving toward others. Devotees of God Siva love everyone.
—Gurudeva